In Mistakes for the first case setup Fig. 2, the drag stabilized roughly after 2500 seconds. This will be set as the new simulation duration.

As you can see in Fig. 1, the inlet and outlet are the “side wall”. The walls are “inlet”, “outlet”, and “walls”. That is how most of the computations define the name. It is just a bit of luck that I got some calculations.

Figure 1: Wrong definition for boundaries.

Figure 1: Wrong definition for boundaries.

This was how I defined the velocity at those boundaries. As you can see, inlet makes sense. I have prescribed a fixedValue and a velocity vector. However, for outlet, inletOutlet was chosen. On the wall, it makes sense to most of the boundaries, but not for outlet.

It’s quite interesting to see that a very wrong boundary description still gave me some results.

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boundaryField
{
    inlet
    {
        type            fixedValue;
        value           uniform (100 0 0);
    }
    outlet
    {
        type            inletOutlet;
        inletValue      uniform (0 0 0);
        value           uniform (100 0 0);
    }
    walls
    {
        type            fixedValue;
        value           uniform (100 0 0);
    }
    final_rotate
    {
        type            noSlip;
    }
}